IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v20y2023i6p5211-d1098629.html
   My bibliography  Save this article

Research on Seawater Intrusion Suppression Scheme of Minjiang River Estuary

Author

Listed:
  • Ziyuan Wang

    (College of Hydrology and Water Resources, Hohai University, Nanjing 210003, China)

  • Yiqing Guan

    (College of Hydrology and Water Resources, Hohai University, Nanjing 210003, China)

  • Danrong Zhang

    (College of Hydrology and Water Resources, Hohai University, Nanjing 210003, China)

  • Alain Niyongabo

    (College of Hydrology and Water Resources, Hohai University, Nanjing 210003, China)

  • Haowen Ming

    (College of Hydrology and Water Resources, Hohai University, Nanjing 210003, China)

  • Zhiming Yu

    (Minjiang River Estuary Hydrology Experiment Station, Fujian Hydrology and Water Resources Survey Bureau, Fuzhou 350011, China)

  • Yihui Huang

    (Minjiang River Estuary Hydrology Experiment Station, Fujian Hydrology and Water Resources Survey Bureau, Fuzhou 350011, China)

Abstract

Seawater intrusion in the Minjiang River estuary has gravely endangered the water security of the surrounding area in recent years. Previous studies mainly focused on exploring the mechanism of intrusion, but failed to provide a scheme for suppressing seawater intrusion. The three most relevant determinants to chlorine level, which represented the strength of seawater intrusion, were determined using Pearson correlation analysis as being the daily average discharge, daily maximum tidal range, and daily minimum tidal level. Considering the lower requirement of sample data and the ability to handle high-dimensional data, the random forest algorithm was used to construct a seawater intrusion suppression model and was combined with a genetic algorithm. The critical river discharge for suppressing estuary seawater intrusion determined using this model. The critical river discharge was found to gradually increase with the maximum tidal range, which in three different tide scenarios was 487 m 3 /s, 493 m 3 /s, and 531 m 3 /s. The practicable seawater intrusion suppression scheme was built up with three phases to make it easier to regulate upstream reservoirs. In the scheme, the initial reading of river discharge was 490 m 3 /s, and it rose to 650 m 3 /s over six days, from four days before the high tide’s arrival to two days following it, and before falling down to 490 m 3 /s at the end. Verified with the 16 seawater intrusion events in the five dry years, this scheme could eliminate 75% of the seawater intrusion risk and effectively reduce the chlorine level for the remaining 25% of events.

Suggested Citation

  • Ziyuan Wang & Yiqing Guan & Danrong Zhang & Alain Niyongabo & Haowen Ming & Zhiming Yu & Yihui Huang, 2023. "Research on Seawater Intrusion Suppression Scheme of Minjiang River Estuary," IJERPH, MDPI, vol. 20(6), pages 1-15, March.
  • Handle: RePEc:gam:jijerp:v:20:y:2023:i:6:p:5211-:d:1098629
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/20/6/5211/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1660-4601/20/6/5211/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Zhi Xu & Jing Ma & Hao Wang & Jianshi Zhao, 2020. "Influence of River Discharge on the Transport of the Saltwater Group from the North Branch in the Yangtze River Estuary," IJERPH, MDPI, vol. 17(24), pages 1-21, December.
    2. Zhi Xu & Jing Ma & Yajie Hu, 2019. "Saltwater Intrusion Function and Preliminary Application in the Yangtze River Estuary, China," IJERPH, MDPI, vol. 16(1), pages 1-19, January.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Zhi Xu & Jing Ma & Hao Wang & Jianshi Zhao, 2020. "Influence of River Discharge on the Transport of the Saltwater Group from the North Branch in the Yangtze River Estuary," IJERPH, MDPI, vol. 17(24), pages 1-21, December.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:20:y:2023:i:6:p:5211-:d:1098629. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.